diff options
| author | Rick Chen <rick@andestech.com> | 2018-03-29 10:08:33 +0800 |
|---|---|---|
| committer | Andes <uboot@andestech.com> | 2018-03-30 13:13:56 +0800 |
| commit | d58717e42559189a226ea800173147399c8edef9 (patch) | |
| tree | a94bffe91400f0486571454a3db56733899c4c7e /board | |
| parent | 2bc5bea9e160c7efe5a268a55b440ac8cf848b48 (diff) | |
riscv: ae250: Support DT provided by the board at runtime
Enable CONFIG_OF_BOAD to support delivery dtb to u-boot
at run time instead of embedded.
There are two methods to delivery dtb.
1 Pass from loader:
When u-boot boot from RAM, gdb or loader can pass dtb
via a2 to u-boot dynamically. Of course gdb or loader
shall be in charge of dtb delivery.
2 Configure CONFIG_SYS_FDT_BASE:
It can be configured as RAM or ROM base statically,
no mater u-boot boot from RAM or ROM.
If it was configured as ROM base, dtb can be burned
into ROM(spi flash) by spi driver.
Meanwhile remove CONFIG_SKIP_LOWLEVEL_INIT which is
useless in nx25-ae250 configuration.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/AndesTech/nx25-ae250/nx25-ae250.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/board/AndesTech/nx25-ae250/nx25-ae250.c b/board/AndesTech/nx25-ae250/nx25-ae250.c index a965218f345..6e31be35052 100644 --- a/board/AndesTech/nx25-ae250/nx25-ae250.c +++ b/board/AndesTech/nx25-ae250/nx25-ae250.c @@ -64,3 +64,12 @@ ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info) { return 0; } + +void *board_fdt_blob_setup(void) +{ + void **ptr = (void *)CONFIG_SYS_SDRAM_BASE; + if (fdt_magic(*ptr) == FDT_MAGIC) + return (void *)*ptr; + + return (void *)CONFIG_SYS_FDT_BASE; +} |